A standard 1/5" format imager has an active area of
2.8mm x 2.1mm with diagonal size of 3.5mm. This format is popular for
low-cost consumer devices such as webcams. To cover the entire imager
active area the lens image circle must be greater than the imager diagonal.
Download application note on imager circle vs. active area.

To meet your unique application requirement, we can also customize standard
products or provide you a complete custom solution from design to volume
production.